C#超实用代码段合集

using system;
using system.collections.generic;
using system.componentmodel;
using system.data;
using system.drawing;
using system.linq;
using system.text;
using system.windows.forms;
namespace notifyiconshow
{
 public partial class notifyiconshow : form
 {
  public notifyiconshow()
  {
   initializecomponent();
  }
  #region//设置鼠标放在托盘图标上面的文字
  /// <summary>
  /// 方法名称：notifyiconshow_load(窗体加载事件)
  /// 方法作用：设置鼠标放在托盘图标上面的文字
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void notifyiconshow_load(object sender, eventargs e)
  {
   //设置鼠标放在托盘图标上面的文字
   this.notifyicon1.text = "心语托盘图标";
  }
  #endregion
  #region//创建对象及声明变量
  //创建notifyicon对象
  notifyicon notifyicon = new notifyicon();
  //创建托盘图标对象
  icon ico = new icon("clock2.ico");
  //创建托盘菜单对象
  contextmenu notifycontextmenu = new contextmenu();
  #endregion
  #region//隐藏任务栏图标，显示托盘图标
  /// <summary>
  /// 方法名称：notifyiconshow_sizechanged(窗体大小改变后事件)
  /// 方法作用：隐藏任务栏图标，显示托盘图标
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void notifyiconshow_sizechanged(object sender, eventargs e)
  {
   //判断是否选择的是最小化按钮
   if (windowstate == formwindowstate.minimized)
   {
    //托盘显示图标等于托盘图标对象
    //注意notifyicon1是控件的名字而不是对象的名字
    notifyicon1.icon = ico;
    //隐藏任务栏区图标
    this.showintaskbar = false;
    //图标显示在托盘区
    notifyicon.visible = true;
   }
  }
  #endregion
  #region//还原窗体
  /// <summary>
  /// 方法名称：notifyicon1_click（托盘图标单击）
  /// 方法作用：还原窗体
  /// 完成日期：2010年5月16日
  /// 作者：心语
  /// </summary>
  /// <param name="sender"></param>
  /// <param name="e"></param>
  private void notifyicon1_click(object sender, eventargs e)
  {
   //判断是否已经最小化于托盘
   if (windowstate == formwindowstate.minimized)
   {
    //还原窗体显示
    windowstate = formwindowstate.normal;
    //激活窗体并给予它焦点
    this.activate();
    //任务栏区显示图标
    this.showintaskbar = true;
    //托盘区图标隐藏
    notifyicon.visible = false;
   }
  }
  #endregion
 }
}

class program
{
  static void main(string[] args)
  {
   int n = m(20, 15);
   system.console.writeline("最小公倍数为:" + n.tostring());
   system.console.read();
  }
  static int f(int a, int b)//最大公约数 
  {
   if (a < b) { a = a + b; b = a - b; a = a - b; }
   return (a % b == 0) ? b : f(a % b, b);
  }
  static int m(int a, int b)//最小公倍数 
  {
   return a * b / f(a, b);
  }
}

/// <summary> 
/// 把汉字转换成拼音(全拼) 
/// </summary> 
/// <param name="hzstring">汉字字符串</param> 
/// <returns>转换后的拼音(全拼)字符串</returns> 
public static string converte(string hzstring)
{
 // 匹配中文字符 
 regex regex = new regex("^[\u4e00-\u9fa5]$");
 byte[] array = new byte[2];
 string pystring = "";
 int chrasc = 0;
 int i1 = 0;
 int i2 = 0;
 char[] nowchar = hzstring.tochararray();
 for (int j = 0; j < nowchar.length; j++)
 {
  // 中文字符 
  if (regex.ismatch(nowchar[j].tostring()))
  {
   array = system.text.encoding.default.getbytes(nowchar[j].tostring());
   i1 = (short)(array[0]);
   i2 = (short)(array[1]);
   chrasc = i1 * 256 + i2 - 65536;
   if (chrasc > 0 && chrasc < 160)
   {
    pystring += nowchar[j];
   }
   else
   {
    // 修正部分文字 
    if (chrasc == -9254) // 修正“圳”字 
     pystring += "zhen";
    else
    {
     for (int i = (pyvalue.length - 1); i >= 0; i--)
     {
      if (pyvalue[i] <= chrasc)
      {
       pystring += pyname[i];
       break;
      }
     }
    }
   }
  }
  // 非中文字符 
  else
  {
   pystring += nowchar[j].tostring();
  }
 }
 return pystring;
}
private static int[] pyvalue = new int[] 
{ 
 -20319,-20317,-20304,-20295,-20292,-20283,-20265,-20257,-20242,-20230,-20051,-20036, 
 -20032,-20026,-20002,-19990,-19986,-19982,-19976,-19805,-19784,-19775,-19774,-19763, 
 -19756,-19751,-19746,-19741,-19739,-19728,-19725,-19715,-19540,-19531,-19525,-19515, 
 -19500,-19484,-19479,-19467,-19289,-19288,-19281,-19275,-19270,-19263,-19261,-19249, 
 -19243,-19242,-19238,-19235,-19227,-19224,-19218,-19212,-19038,-19023,-19018,-19006, 
 -19003,-18996,-18977,-18961,-18952,-18783,-18774,-18773,-18763,-18756,-18741,-18735, 
 -18731,-18722,-18710,-18697,-18696,-18526,-18518,-18501,-18490,-18478,-18463,-18448, 
 -18447,-18446,-18239,-18237,-18231,-18220,-18211,-18201,-18184,-18183, -18181,-18012, 
 -17997,-17988,-17970,-17964,-17961,-17950,-17947,-17931,-17928,-17922,-17759,-17752, 
 -17733,-17730,-17721,-17703,-17701,-17697,-17692,-17683,-17676,-17496,-17487,-17482, 
 -17468,-17454,-17433,-17427,-17417,-17202,-17185,-16983,-16970,-16942,-16915,-16733, 
 -16708,-16706,-16689,-16664,-16657,-16647,-16474,-16470,-16465,-16459,-16452,-16448, 
 -16433,-16429,-16427,-16423,-16419,-16412,-16407,-16403,-16401,-16393,-16220,-16216, 
 -16212,-16205,-16202,-16187,-16180,-16171,-16169,-16158,-16155,-15959,-15958,-15944, 
 -15933,-15920,-15915,-15903,-15889,-15878,-15707,-15701,-15681,-15667,-15661,-15659, 
 -15652,-15640,-15631,-15625,-15454,-15448,-15436,-15435,-15419,-15416,-15408,-15394, 
 -15385,-15377,-15375,-15369,-15363,-15362,-15183,-15180,-15165,-15158,-15153,-15150, 
 -15149,-15144,-15143,-15141,-15140,-15139,-15128,-15121,-15119,-15117,-15110,-15109, 
 -14941,-14937,-14933,-14930,-14929,-14928,-14926,-14922,-14921,-14914,-14908,-14902, 
 -14894,-14889,-14882,-14873,-14871,-14857,-14678,-14674,-14670,-14668,-14663,-14654, 
 -14645,-14630,-14594,-14429,-14407,-14399,-14384,-14379,-14368,-14355,-14353,-14345, 
 -14170,-14159,-14151,-14149,-14145,-14140,-14137,-14135,-14125,-14123,-14122,-14112, 
 -14109,-14099,-14097,-14094,-14092,-14090,-14087,-14083,-13917,-13914,-13910,-13907, 
 -13906,-13905,-13896,-13894,-13878,-13870,-13859,-13847,-13831,-13658,-13611,-13601, 
 -13406,-13404,-13400,-13398,-13395,-13391,-13387,-13383,-13367,-13359,-13356,-13343, 
 -13340,-13329,-13326,-13318,-13147,-13138,-13120,-13107,-13096,-13095,-13091,-13076, 
 -13068,-13063,-13060,-12888,-12875,-12871,-12860,-12858,-12852,-12849,-12838,-12831, 
 -12829,-12812,-12802,-12607,-12597,-12594,-12585,-12556,-12359,-12346,-12320,-12300, 
 -12120,-12099,-12089,-12074,-12067,-12058,-12039,-11867,-11861,-11847,-11831,-11798, 
 -11781,-11604,-11589,-11536,-11358,-11340,-11339,-11324,-11303,-11097,-11077,-11067, 
 -11055,-11052,-11045,-11041,-11038,-11024,-11020,-11019,-11018,-11014,-10838,-10832, 
 -10815,-10800,-10790,-10780,-10764,-10587,-10544,-10533,-10519,-10331,-10329,-10328, 
 -10322,-10315,-10309,-10307,-10296,-10281,-10274,-10270,-10262,-10260,-10256,-10254 
};
private static string[] pyname = new string[] 
{ 
 "a","ai","an","ang","ao","ba","bai","ban","bang","bao","bei","ben", 
 "beng","bi","bian","biao","bie","bin","bing","bo","bu","ba","cai","can", 
 "cang","cao","ce","ceng","cha","chai","chan","chang","chao","che","chen","cheng", 
 "chi","chong","chou","chu","chuai","chuan","chuang","chui","chun","chuo","ci","cong", 
 "cou","cu","cuan","cui","cun","cuo","da","dai","dan","dang","dao","de", 
 "deng","di","dian","diao","die","ding","diu","dong","dou","du","duan","dui", 
 "dun","duo","e","en","er","fa","fan","fang","fei","fen","feng","fo", 
 "fou","fu","ga","gai","gan","gang","gao","ge","gei","gen","geng","gong", 
 "gou","gu","gua","guai","guan","guang","gui","gun","guo","ha","hai","han", 
 "hang","hao","he","hei","hen","heng","hong","hou","hu","hua","huai","huan", 
 "huang","hui","hun","huo","ji","jia","jian","jiang","jiao","jie","jin","jing", 
 "jiong","jiu","ju","juan","jue","jun","ka","kai","kan","kang","kao","ke", 
 "ken","keng","kong","kou","ku","kua","kuai","kuan","kuang","kui","kun","kuo", 
 "la","lai","lan","lang","lao","le","lei","leng","li","lia","lian","liang", 
 "liao","lie","lin","ling","liu","long","lou","lu","lv","luan","lue","lun", 
 "luo","ma","mai","man","mang","mao","me","mei","men","meng","mi","mian", 
 "miao","mie","min","ming","miu","mo","mou","mu","na","nai","nan","nang", 
 "nao","ne","nei","nen","neng","ni","nian","niang","niao","nie","nin","ning", 
 "niu","nong","nu","nv","nuan","nue","nuo","o","ou","pa","pai","pan", 
 "pang","pao","pei","pen","peng","pi","pian","piao","pie","pin","ping","po", 
 "pu","qi","qia","qian","qiang","qiao","qie","qin","qing","qiong","qiu","qu", 
 "quan","que","qun","ran","rang","rao","re","ren","reng","ri","rong","rou", 
 "ru","ruan","rui","run","ruo","sa","sai","san","sang","sao","se","sen", 
 "seng","sha","shai","shan","shang","shao","she","shen","sheng","shi","shou","shu", 
 "shua","shuai","shuan","shuang","shui","shun","shuo","si","song","sou","su","suan", 
 "sui","sun","suo","ta","tai","tan","tang","tao","te","teng","ti","tian", 
 "tiao","tie","ting","tong","tou","tu","tuan","tui","tun","tuo","wa","wai", 
 "wan","wang","wei","wen","weng","wo","wu","xi","xia","xian","xiang","xiao", 
 "xie","xin","xing","xiong","xiu","xu","xuan","xue","xun","ya","yan","yang", 
 "yao","ye","yi","yin","ying","yo","yong","you","yu","yuan","yue","yun", 
 "za", "zai","zan","zang","zao","ze","zei","zen","zeng","zha","zhai","zhan", 
 "zhang","zhao","zhe","zhen","zheng","zhi","zhong","zhou","zhu","zhua","zhuai","zhuan", 
 "zhuang","zhui","zhun","zhuo","zi","zong","zou","zu","zuan","zui","zun","zuo" 
};

//导入该命名空间
using system.diagnostice;
stopwatch watch=new stopwatch ();
watch.start();
/*
此处为要计算的运行代码
*/
watch.stop();
//获取当前实例测量得出的总运行时间（以毫秒为单位）
string time = watch.elapsedmilliseconds.tostring();

protected void page_load(object sender, eventargs e)
{
    int m = system.datetime.today.month;
    int y = system.datetime.today.year;
    int d = system.datetime.today.day;
    int weeks = getweekday(y, m, d);
    switch (weeks)
    {
      case 1:
        this.textbox1.text = "星期一";
        break;
      case 2:
        this.textbox1.text = "星期二";
        break;
      case 3:
        this.textbox1.text = "星期三";
        break;
      case 4:
        this.textbox1.text = "星期四";
        break;
      case 5:
        this.textbox1.text = "星期五";
        break;
      case 6:
        this.textbox1.text = "星期六";
        break;
      case 7:
        this.textbox1.text = "星期日";
        break;
    }
}
/// <summary>根据日期，获得星期几</summary>
/// <param name="y">年</param>
/// <param name="m">月</param>
/// <param name="d">日</param>
/// <returns>星期几，1代表星期一；7代表星期日</returns>
public static int getweekday(int y, int m, int d)
{
    if (m == 1) m = 13;
    if (m == 2) m = 14;
    int week = (d + 2 * m + 3 * (m + 1) / 5 + y + y / 4 - y / 100 + y / 400) % 7 + 1;
    return week;
}

/// <summary>
/// c# 删除文件夹
/// 用法： deletefolder(@"c:\\1");
/// </summary>
/// <param name="dir"></param>
private static void deletefolder(string dir)
{
  // 循环文件夹里面的内容
  foreach (string f in directory.getfilesystementries(dir))
  {
  // 如果是文件存在
  if (file.exists(f))
  {
  fileinfo fi = new fileinfo(f);
  if (fi.attributes.tostring().indexof("readonly") != 1)
  {
  fi.attributes = fileattributes.normal;
  }
  // 直接删除其中的文件
  file.delete(f);
  }
  else
  {
  // 如果是文件夹存在
  // 递归删除子文件夹
  deletefolder(f);
  }
  }
  // 删除已空文件夹
  directory.delete(dir);
}